title: T-cadherin is essential for adiponectin-mediated revascularization.
abstract: Adipose tissue secretes protein factors that have systemic actions on cardiovascular tissues. Previous studies have shown that ablation of the adipocyte-secreted protein adiponectin leads to endothelial dysfunction, whereas its overexpression promotes wound healing. However, the receptor(s) mediating the protective effects of adiponectin on the vasculature is not known. Here we examined the role of membrane protein T-cadherin, which localizes adiponectin to the vascular endothelium, in the revascularization response to chronic ischemia. T-cadherin-deficient mice were analyzed in a model of hind limb ischemia where blood flow is surgically disrupted in one limb and recovery is monitored over 28 days by laser Doppler perfusion imaging. In this model, T-cadherin-deficient mice phenocopy adiponectin-deficient mice such that both strains display an impaired blood flow recovery compared with wild-type controls. Delivery of exogenous adiponectin rescued the impaired revascularization phenotype in adiponectin-deficient mice but not in T-cadherin-deficient mice. In cultured endothelial cells, T-cadherin deficiency by siRNA knockdown prevented the ability of adiponectin to promote cellular migration and proliferation. These data highlight a previously unrecognized role for T-cadherin in limb revascularization and show that it is essential for mediating the vascular actions of adiponectin.
authors.affiliation: Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, Massachusetts 02118, USA.
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Parker-Duffen
authors.forename: Kazuto
authors.initials: K
authors.lastname: Nakamura
authors.forename: Marcy
authors.initials: M
authors.lastname: Silver
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Kikuchi
authors.forename: Ulrich
authors.initials: U
authors.lastname: Tigges
authors.forename: Sumiko
authors.initials: S
authors.lastname: Yoshida
authors.forename: Martin S
authors.initials: MS
authors.lastname: Denzel
authors.forename: Barbara
authors.initials: B
authors.lastname: Ranscht
authors.forename: Kenneth
authors.initials: K
authors.lastname: Walsh
mesh_terms: D052242:Adiponectin / Q000235:genetics / Q000378:metabolism*; D000818:Animals; D015820:Cadherins / Q000235:genetics / Q000378:metabolism*; D004730:Endothelium, Vascular / Q000378:metabolism*; D055785:Gene Knockdown Techniques; D006614:Hindlimb / Q000098:blood supply; D007511:Ischemia / Q000235:genetics / Q000378:metabolism; D051379:Mice; D018345:Mice, Knockout; D018919:Neovascularization, Physiologic / Q000502:physiology*
chemical_list: D052242:Adiponectin; D015820:Cadherins; C099972:H-cadherin
keywords: AdipoR1; AdipoR2; Adiponectin; Angiogenesis; Ischemia; Peripheral Vascular Disease; Skeletal Muscle; T-cadherin; Vascular Biology